Car loans: collateral, insurance and the down payment

A car loan is a purpose loan: the money buys a specific car, and that car becomes the security. For you that is a gain on the rate and a loss on freedom — until the loan is cleared the car is pledged, and you cannot sell or re-register it without the lender’s consent.

That security is exactly why a car loan is cheaper than a consumer loan of the same size. The lender’s risk is lower because there is something to recover. If you take an unsecured consumer loan to buy a car and avoid the pledge, you are paying for that freedom in interest.

A down payment works in two directions at once: it cuts the debt, and it often improves the rate, because it lowers the lender’s risk. The effect on total cost is non-linear — raising the deposit saves more than it looks, because interest accrues on a smaller balance for the whole term.

The term works the other way. Stretching a loan lowers the monthly payment and raises the total overpayment, sometimes sharply. Run the same loan over 24 and 60 months, and the difference in the final figure explains it better than any prose.

Third: on a secured car loan, insuring the car itself is normally mandatory for the full term. That is a real annual cost absent from the nominal rate — count it in when comparing against an unsecured option.